Cooking-stove.



' B. B. KAHN.

cooKlNG sTovE.

APPLIC 1915. 1,168,510. 111191111111311'. 18, 1916.

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COOKlN-G STOVE.

APPLICATION man Aucas. 1915.

Patented J an. 18, 1916.l

Inventor Witness: a

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, Attorney B. B. KAHN.

COOKING STOVE.

APPLICATION FILED AUG.9 1915.

1.916,51@ Patented Jan. 18, 1916.

3 SHEETS-SHEET 3.

Witness: Inventor Attorney THE COLUMBIA PLANOGRAPH co1, WASHINGTON, D. c.

tura sTATs PAT u non.

BERTRAND B. KAHN, or OINGINNATI, oHIo, Assleivon To THE ESTATE sTovi:

f COMPANY, or HAMILTON, omo.

COOKING-straus..

meetic.

Specification of Letters LPatent.`

Patented Jan. 18, 1216.

Application sied August 9, 1915. serial nefasta?.

To all whom t may concern Be it known that I, BERTRAND B. KAHN, a citizen of the United States, residing at Cincinnati, Hamilton count-y, Ohio, have invented certain new and useful Improvements in Cooking-Stoves, of which the fol'-` lowing is a specilication.

This invention pertaining to cooking stoves relates to a stove of duplex character designed-for the use of either solid fuel or gas, and the invention will be readily understood from the following description taken in connection with the accompanying drawings in which z- Figure l is a plan of a duplex cooking stove exemplifying my invention, the grid work over the gas burners in the top` burner chamber being omitted: Fig. 2 a front elevation of the same: Fig. 3 a. vertical longitudinal section of the stove in the plane of line a of Figs; 1, 4l, 6 and il: Fig. l a horizontal section in the plane oi.' line Z) of Figs.

2, 3, 5 and 7, the oven burner being omitted:

Fig. 5 a rear view of the stove: Fig. 6 a horizontal section of the stove in the plane of line o of Figs. 2, 3, 5, 7 and 8, the dampers in the upper portion of the stove being omitted: Fig. 7 a vertical transverse section of a `portion of the structurein the plane of line Z of Figs. 1, 2, 3, and 5: Fig. 8 a transverse section of the structure in the plane of line e of Figs. 1 and 6: and Fig. if a vertical transverse section of the structure in the plane of line f of F igs. 2, 3 and 4.

Before describing the features of con` struction constituting the present improvements, I will describe those features de signed for the utilization of solid fuel and constituting a fundamental structure which is modied `in view of the improvements. A diversity of scales is employed in the drawings.

In the drawings, giving present considera'- tion mainly to Fig. 3 1, indicatesthe general ystove structure: 2,'the extreme top: 3, the extreme bottom: 4.-, the fire-box: 5, the grate" at the base of the fire-box: 6, the ash-pit: 7, the oven: 8, the vertical wall separating the oven from the ,fire-box and ash-pit: 9, the main top of the oven: 10, the main floor of the oven: 11v the outlet to the chimney; 12, the horizontal flue formed at the top of the oven between the main top of 'the oven and the main top of the stove: 13, a vertical flue at that portion of the oven farthest from the fire-box and leading downward from about the level of the top of the oven to below the oven: 14, av horizontal flue leading under the oven from flue 13: 15, a port leading from iue 12 into the outlet to the chimney: 16, a damper to open or close this port: 17, a port through the rear wall of the stove placing horizontal iiue 11 in communication with the outlet to the chimney: 18, a deiiector disposed transversely in ilue let and leadingforwarc'l from the back of the stove to a point about halfway to the `front of the stove: 19, a handle for controlling damper 16: 20, the outer wall of Hue 13: 21, a partition disposed in iue 12 and extending from the front to the rear of that iiue, this partition being disposed at a point between flue 13 and the outlet 15 to the chimney.

Assume, now, for the present, that partif tion 21 was disposed vertically over wall 20 and that flue 13 was open at its upper end so as' to be in communication with flue 12. In such case there would be presented the ordinary construction of cooking stoves in which the products from the fire-boX may pass around the major portion of the oven, to heat the oven, or, alternatively,y may be given a direct outlet from flue 12 into the outlet to the chimney. 1f, under the conditions assumed, damper 16 were closed, then the hot products from the fire-box would pass through flue 12 to and through flue 13 and through bottom flue 14 and then` through port 17 to the outlet to the chimney. The products in passing through bottom flue 14 are caused to move toward the front of the stove and then backward to port 17. If, however, damper 16 be opened, then the products, taking the path of least resistance, go direct to the outlet `to the chimney through port 15 instead of passing around the oven. All of this under the assumed construction, would be the same as is common in cooking stoves, and the features thus far referred to may be as usual and subject to such modication of structure as is consistent with the improvements to ybe later explained- Bu While it has been assumed, for the purpose of preliminary understanding, that the righthand end of Hue 12 communicated directly with the top of Hue 13, a consideration of Fig. 3 will show that Hue 12 does not extend sufficiently to the right to be over the top of Hue 13, and that the upper end .of Hue v13k is closed. Wall 21 'closing the righthand end of Hue 12 is given the general position indicated for purposes which will be later explained and has brought about the necessity for an unusual system of communication between Hues 12and 13.

Proceeding with the drawings :-22, indicates a vertical Hue structure disposed at the back of the stove and constituting the communication between ports 15 and 17 and chimney outlet 11; '23, a Hue-box disposed at the rear of the stove between Hue structure 22 and wall 20: and 24, a port leading-from Hue 12 back into Hue-box 23: and 24a, a port leading from Hue-box 23 into the upper portion of Hue 13.

When solid fuel is being burned, the hoty products from the fire-box passto the right through' Hue 12 and then pass rearwardly through port 24 and into Hue-box 23k and thence through port 24a to Hue 13 and thence through horizontal Hue 14 to port 17 leading to the chimney outlet. Aside from the peculiarities of construction the` functional-result is substantially the same as usual, the only difference being that 1n the present construction the products pass- .of the oven and having its lefthand wall formed by partition 21: 26, burners and burner pipes disposed within the burnerbox, four cooking burners and one simmering burner being illustrated: 27, a port leading through the back wall of the burner-box and into Hue-box 23: 28, a damper for opening and closing this port: 29, the handle for controlling the damper 28: 30, the gas supply pipe for supplying burners 26: and 31, the mixers and cocks pertaining to burners 26.

l In using solid fuel damper 28 may be closed to prevent products going into the burner-box and thence to the kitchen, if the burner-box has a grided top. Whengas is employed in burner-box 25 dampers 28 and 16 are to be open so that the products from the burner-box may go through port27 and Hue-box 23 and port 24 and Hue 12 burner-,box will be provided with the usual ,grid worlcfor sustaining vessels, &c., over the burners. Looking at Figs. 1 and 2 and giving consideration to such portions of the structure as do not include the overhang of the burner-box it will be apprehended thatk the dimensions of suchstrueture are substantially such asy would be involved in a stove for burning solid fuel and provided with six pot-holes in its top. 1n my construction 1 have abandoned two of the potholes which would be present in the above assumed case and have utilized the space by causing thel inner portion of the burnerbox to overlap the oven, the balance of the burner-box projecting outwardly from the general structure and being supported on brackets. v

Itis my preference that `vertical Hue 22 and Hue-box 23be extraneous structures se'- cured at the rear of the main body of the stove, though this is not essential.

yso

1 provide an oven burner for heating the oven when gaseous fuel is employed and will now explain this feature. Proceeding with the drawings 32, indicates a burnerpit inthe base of the oven between wall 8 and the lefthand end of Hue 14, this pit extending from Hoor 10 of the oven to bottomplate 3 of the stove: 33, a pivoted cover for the burner-pit, adapted, whenin closed position, to complete vthe Hoorl of the oven over the burner-pit: 33a, an oven-burner disposed in the burner-pit: 34, air ports leading throughthe bottom of the stove" and into the burner-pit: 35, a valve-plate adapted to close these air ports, the platexbeing killustrated as being opened and closed by ahinging motion: 36, the mixer and cock for the oven burner: 37, the gas supply-pipe for the oven burner: 38a movable plate disposed in the base of the oven above Hoor y10 of the oven at a little distance above said Hoor and extending over the burner-pit: 39, insulating material, as a sheet of asbestos, secured tothe lefthand portion of plate 38: 40, a

series of ports or an equivalent slot extendf valve-plate 35: 46, a valve adapted to Open messia@ and close port 44 whichlplaces Hue 43 `in communication with the chimney outlet :l 47 arm connecting valve 16 with valve 46 in such manner that they will open and' close in unison: and 48, an aperture in cover `33to engage lever 45 and hold air-ports 34 closed so long as the coveris down. Looking at Fig. 3, and assuming that gas is to be employed in heating the oven, plate 38, which is not otherwise needed, is to be put in place and when it reaches yits rearmost position it opens valve-,plate 35 and admits secondary air to the burner-pit. The oven-burner, having been lighted,causes hot products to move to the right through the passage formed between plate, 38 and main floor lO of the oven. Theproducts pass up into the oven through ports 40 and move out of the oven through ports 42 and thence througlrport 44 to the outlet to the chimney. As the lefthand portion of plate 38 is apt to be excessively hot, by reason .of being disposed over the oven-burner, the insulating material 39 is designed to neutralize this excessiveness of heat. Plate 38 may, if desired, be allowed to remain in the oven at all times, regardless of, whether the oven is being heated by gas or solid fuel, but the presence of the plate detracts from the vertical dimension ofthe oven. W'hen cover 33 is turned; up to open the top of the burner-pit it is held in that position by plate 3S, and Aupon the withdrawal of plate 38 the cover falls to its normal position as a 'continuat'ion of oven floor 10.1 f

Port 44 which permits the products from the oven to pass to the outlet yt'or the 'chimney might be permitted to remain always open, but I have foundpin practice, that it' this port 44 be constantly open it will permit undesirable escape ofheatedair from the oven and also detractsomewhat from the effect of the draft in drawing hot products from the fire-box around the l,ovens It is for this reason that I connect `dampers 16 and 46, so that when damper lois closed to cause the products from the lire-box to pass around the oven the valve 46 cuts oli' communication between the oven and the chimney. f

I have referredl to the top` burner-box as being provided in itsr top with the usual grid-work for the support of cooking vessels, but it should beunderstood that when natural `gas is employed, instead ofl artiicial gas, the top of the burner-boxshould be closed by a solid top provided with potholes.

In order to distinguish between the multiplicity of lues found in the structure, I will call line-structure 22 'the chimney-flue as its sole oilice is to place various other fiues or spaces in communication with the outlet to the chimney, and I will callilue-l` the vertical flue, and I will call iiue `12 the cation with the bottom-flue,

fire-boit over such `portion of the oven as i is not'overlapped by the burner-box, a," l

vertical flue extending ydown the side of the oven on the sideopposite the fire-box, ay `bottom flue communicating therewith and passing under the oven, a chimney-ilus connected `with, the outlet to the chimney, a port placing the cliimney-iiuein communia port placing the chimney-Hue in communication'with the c top line, a damper adapted to open and close communication between the top flue and the chimney-flue, and a flue-structure Vdisposed at the back of the stove in communication with the top flue and with the upper portion of said vertical flue, combined substantially as set forth.

2. A cooking' stove comprising, an oven,

a. fire-box, a top burner-bor; overlapping 'the oven, a top flue extending from the lire-box oversuch portion of the oven as is not overlapped by the burner-box, a vertical flue extending down the side of the oven on the side opposite the tire-box, a bottom rflue cominunicating therewith and passing under the ov'en, a chimney-flue connected with the outlet to thechimney, a port placing the chimney-flue in4 communication with the bottom flue, a port placing the chimneyiiuein communication with `the top flue, a c

damper adapted to open and-close communication between the top flue and the chimneyflue, a line-structure disposed at the back of the stove in communication lwith the top .iiue and with the upper portion of said ver-` tical line, and a portf placing the burnerboxl in 'communication with the Hue-structure, combined substantially as set forth. A

A cooking-stove comprising, an oven,

a re-boxya top burner-box overlapping the oven, a top flue extending from the tire-box oversuch portion of the ovenas is notoverlapped by the burner-box, a vertical flue extending down the side of the oven on the side opposite the fire-box, a bottom flue com-fk municating therewith and passing under the,

oven, a. chimney-flue connected withthe outlet to the chimney, a port placing thegchimney-lue in communication withthe bottom flue, a port placing the chimney-Hue in communication with the top iiue, a damper adapted to open and close communication betweenthe top flue and the chimney-flue, a4 tine-structure disposed at the back of the stove in communication with the top flue and with the upper portion of said vertical iue, a port placing the burner-box in com-- munication with the liuc-structure, and a I damper .adapted to close communication bechimney-flue,

. having an endk wall tween the burner-box and flue-structure,

combined substantially as set forth.

- Al. A cooking stove comprising, an oven, a fire-box at one side 1of the oven, a top flue extending. from lthe lire-box over the oven, a vertical flue extending down the side of bottom flue communicating withk they vertical flue and passing under the oven and the ovenfrom the fire-box, a chimney-flue connectedfwith the outlet to the chimney, a port placing the chimney-flue in communicationwith the bottom -Hue, a port placing the chimney-flue incommunication with the top flue`,.a damper adapted to open and close communication between the top iiue and the chimneyflud a burner-pit formed between the end wall of the bottom flue and the wall dividing the loven from the fire-boxv and floored by theextreme bottom of the stove and open at its top into the oven, a burner disposed therein, a plate disposed in the base of the oven above the main floor of the oven and extending over said main floor and over the burner-pit and leaving a space between the plate and the main floor of the oven and provided with ports placing said space iny communication with the oven at its side opposite the burner-pit, and a port placing the extreme top of the oven in communication with the chimney Hue, wherebyheated products rising from the vburner-pit pass upwardly the full height of the oven and then out of the oven, lcombined substantially as set forth. y

5. A kcooking stove comprising, an oven, a fire-box at oneside ofthe oven, a top yflue extending fromthe fire-box over the oven, av vertical Vflue extending down the side of the oven on the side opposite the fire-box and in communication with said topv flue, a bottomflue communicating with the vertical flue and passing under the oven and havingranlend oven from the fire-box, a chimney-flue connected with the outlet to the chimney, a

port placing" thechimney-flue in communication with the bottom flue, a port placing the chimney-flue in communication with thetop v`flue, a damper adapted to open and'close chimney-flue,

communication between the top iue andthe the end wall of the bottom fluel andl thewall dividing the oven from the fire-boxv and flooredby the extreme bottom of the stove and open at its top into the oven, a burner disposed therein, a hinged cover disposed over the burner-pit and adapted to fold up against the 7side-wall of the oven, a plate disposed in the base of the oven' above the main floor of the oven and extending over said main ioor and over the burner-.pit and a burner-pit Vformed between v and in communicationwith said top flue, a

near the wall dividingv wall near the wall dividing the' a burner-pit kformed between 4 leaving a space `between the plate and the hey-flue, combined substantially as set forth.

6. A cooking stove comprising, a general stove structur, an oven, a lire-box at one side of the oven, aflue extending from the fire-*box over the oven'and down outside the oven at the sideopposite the fire-box and under the Yoven yand having an end wallnear the wall dividingythe oven from the firebox, a port placing the chimneyilue in communication with the upper portion of said flue passing around the oven, a port placing the chimney-Hue incommunication with the bottom portion Lof said flue passing around the oven, a burner-pit formed betweenthel end wall of the bottom'lue and the wall dividing the,V oven from the fire-box and floored by the-extreme bottomof the stove and open at its top into the oven, a cover hinged at the floor-of the oven and adapted to form a portion of the floor lof the oven or to be turned up against the wall dividing the ash-pit from the oven, and a removable plate disposed in the base of the oven above the main 'floor thereof and extending over said main floor and over the burner-pit to a point a suiiicient distance from the wall dividing the oveny from the fire-box to permit ofthe presence Aof said hinged coverwhen in upturned position, combined substantially as set forth. f

7. A cooking stove comprising, an oven,

a burner-pitextending.along one side there of, 'air-ports throughthe floor of the burnerpit, a valve-plate controlling said air-ports,

a burner disposedy in the burner-pit, a plate disposed removablyin the base of the oven above the main floor thereof and over said' fromithe fire-box over the oven, a verticalv flue at that side of the oven opposite the fire-box, a 'horizontal flue leading under lthe oven from said v`vertical flue, a port leading from the top flue to the chimney Hue, a port leading from the horizontal flue to the chimney-flue,a burner disposed at the base of the oven, a horizontal top flue comprehending the top of the oven, ports leading from the oven to said horizontal top flue, a

port leading from the horizontal top flue to the chimney-flue, a flue structure placing rsaid top line in communication with said vertical flue, a damper to control the port leading from the top flue to the chimneyflue, a damper to control the port leading from said horizontal top flue to the chimney flue, and means for operating said dampers, combined substantially as set forth.

9. A` cooking stove comprising, an oven, a fire-box, a chimney-fine, a top flue leading` from the fire-box over the oven, a vertical Hue atthat side of the oven opposite the Ere-box, a-hoi'izontal flue leading under the oven from `said vertical lue, a port leading frointhe top'lue to the cliimneyfflue, a port leading from the horizontal flue to the chimney-tlue, a burnerdisposed'at the base of the oven, a horizontal top iue comprehend-` ing the top of the oven, ports leading from horizontal top flue to the flue structure placing said top Hue in communication With said vertical flue, a damper to control the port leading i from the top Hue to the chimney-flue, a damper to control the port leadingfrom said horizontal top flue to the chimney-flue,

`means for operating said dampers, and 4operative mechanism connecting said two dampers to cause them to open and close in unison, combined substantially as set forth.

BERTRAND B. KAHN.`

Witnesses:

M. S. BELDEN, GEO. JOHNSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, ILC. 

